Habitat Range of Four Atriplex Species Growing in the Mediterranean Coast of Egypt

Abstract

Atriplex species are tolerant to salinity and drought, therefore; they are an appropriate for restoration of degraded arid and semi-arid lands. Lots of Atriplex species offer a high benefit as non-traditional forages as well. The purpose of this study is to evaluate the habitat range of four Atriplex species in the coastal area of the Mediterranean Sea of Egypt. Two of these species have C 3 photosynthesis; they are namely: A. portulacoides and A. prostrata and the other two are C 4 photosynthesis ( A. halimus and A. nummularia) . The four species are growing in the different habitats along the Mediterranean Coast from New Damietta to Burullus Lake. Associated species with Atriplex were determined and soil samples were collected to identify the types of habitats. Soil samples were analyzed to compare between C 3 and C 4 species on the basis of habitat. Results of soil analysis indicated that EC of the soil in which C 4 species grow is more than that of C 3 species and the percentages (%) of Cl - , CO 3 - and organic carbon of the soil in which C 4 species grow are more than that of C 3 species, moreover, the moisture content of the soil in which C 3 species grow is higher than that of the soil in which C 4 species grow. The obtained results from the soil variables will be useful for the understanding of the optimal habitat for C 3 and C 4 Atriplex species in the Mediterranean Coast of Egypt . Furthermore, the obtained data will help for the agro-application of these important halophytes .